The diagram below shows a cross-sectional view of two spherical equipotential surfaces. The potential at point B is 3.5 V, and the potential at point A is 2.5 V. How much work is done by the electric force when a point charge of 5. OfC moves from C to A through B? (Note: the start point is C; the end point is A.) (unit : 1. 0 x 10-6 J) C B Electric field lines Equipotential surfaces (Cross-sectional view) Oa. 5. 87 Ob. 5. 00 O c. 4. 56 Od. 7. 00 Oe. 1. 32